256102631012 has 12 divisors (see below), whose sum is σ = 449449237356. Its totient is φ = 127688563200.

The previous prime is 256102631011. The next prime is 256102631039. The reversal of 256102631012 is 210136201652.

It can be written as a sum of positive squares in 2 ways, for example, as 128813516836 + 127289114176 = 358906^2 + 356776^2 .

It is a super-2 number, since 2×256102631012² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256102631011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90686489 + ... + 90689312.

It is an arithmetic number, because the mean of its divisors is an integer number (37454103113).

Almost surely, 2^256102631012 is an apocalyptic number.

It is an amenable number.

256102631012 is a deficient number, since it is larger than the sum of its proper divisors (193346606344).

256102631012 is a wasteful number, since it uses less digits than its factorization.

256102631012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181376158 (or 181376156 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 256102631012 its reverse (210136201652), we get a palindrome (466238832664).

The spelling of 256102631012 in words is "two hundred fifty-six billion, one hundred two million, six hundred thirty-one thousand, twelve".